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Add: separated Parallel 8 bit lib

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This commit is contained in:
Andrey Egorov 2024-09-02 13:11:36 +03:00
parent ccbae16a7b
commit efb2447c84
3 changed files with 207 additions and 43 deletions
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37
display/mt-12864a.go
View File

@ -32,7 +32,9 @@ func newMt12864a(logger *log.Logger) (Display, error) {
}
// Temp debug draw
d.logger.Println("Draw...")
d.test()
d.logger.Println("Draw finished")
return &d, nil
}
@ -105,19 +107,30 @@ func (d *displayMt12864a) test() {
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0xFF,
},
}
_ = Logo128
for p := byte(0); p < 8; p++ {
d.dev.WriteCodeL(p | 0xB8)
d.dev.WriteCodeL(0x40)
for c := 0; c < 64; c++ {
d.dev.WriteDataL(Logo128[p][c])
}
d.dev.WriteCodeR(p | 0xB8)
d.dev.WriteCodeR(0x40)
for c := 64; c < 128; c++ {
d.dev.WriteDataR(Logo128[p][c])
}
}
d.logger.Println("Write")
d.dev.WriteCodeL(0xB8)
d.dev.WriteCodeL(0x40)
d.dev.WriteDataL(47)
d.logger.Println("Read")
// d.dev.WriteCodeL(0xB8)
d.dev.WriteCodeL(0x40)
d.logger.Println(d.dev.ReadDataL())
d.logger.Println(d.dev.ReadDataL())
// for p := byte(0); p < 8; p++ {
// d.dev.WriteCodeL(p | 0xB8)
// d.dev.WriteCodeL(0x40)
// for c := 0; c < 64; c++ {
// d.dev.WriteDataL(Logo128[p][c])
// }
// d.dev.WriteCodeR(p | 0xB8)
// d.dev.WriteCodeR(0x40)
// for c := 64; c < 128; c++ {
// d.dev.WriteDataR(Logo128[p][c])
// }
// }
}
func (d *displayMt12864a) GetBounds() image.Rectangle {

53
pkg/mt12864a/mt12864a.go
View File

@ -119,38 +119,37 @@ func (d *mt12864a) SetPixel(x, y byte, c bool) error {
}
func (d *mt12864a) PowerOn() error {
d.pinA0.Low()
d.pinRW.Low()
d.pinE.Low()
d.pinDB0.Low()
d.pinDB1.Low()
d.pinDB2.Low()
d.pinDB3.Low()
d.pinDB4.Low()
d.pinDB5.Low()
d.pinDB6.Low()
d.pinDB7.Low()
d.pinE1.Low()
d.pinE2.Low()
d.pinRES.Low()
d.logger.Println("All low ")
d.PrintPins()
d.logger.Println("Power on")
d.logger.Println(d.ReadStatus(1, 0)) // Should be 0
d.logger.Println("Reset")
d.pinE.Low()
d.pinRES.Low()
time.Sleep(time.Microsecond)
d.logger.Println(d.ReadStatus(1, 0)) // Should be 48 (power off and reset)
d.pinRES.High()
time.Sleep(10 * time.Microsecond)
d.logger.Println(d.ReadStatus(1, 0)) // Should be 32 (power off)
// Module is reset and should be turned off
if d.ReadStatus(1, 0) == 0 || d.ReadStatus(0, 1) == 0 {
return fmt.Errorf("no response from display(or it is possible that it is turned on but...)")
}
d.logger.Println("Power on")
d.PrintPins()
d.logger.Println("Top line to 0")
d.WriteCodeL(0xC0) // Top line to 0
d.WriteCodeR(0xC0) // Top line to 0
d.PrintPins()
d.logger.Println("Display on")
d.WriteCodeL(0x3F) // Display on
d.WriteCodeR(0x3F) // Display on
d.PrintPins()
// Check that crystals are turned on
if (d.ReadStatus(1, 0) & (1 << 5)) != 0 {
return fmt.Errorf("Left cristal is still off")
}
if (d.ReadStatus(0, 1) & (1 << 5)) != 0 {
return fmt.Errorf("Right cristal is still off")
}
return nil
}
@ -188,7 +187,7 @@ func (d *mt12864a) ReadDataR() (byte, error) {
// Low level functions
func (d *mt12864a) writeByte(b byte, cd, l, r rpio.State) error {
d.logger.Println("Write byte", b, cd, l, r)
// d.logger.Println("Write byte", b, cd, l, r)
if l == rpio.High && r == rpio.High {
d.logger.Println("L and R are high!!!")
return fmt.Errorf("cannot write left and right at the same times")
@ -218,14 +217,6 @@ func (d *mt12864a) writeByte(b byte, cd, l, r rpio.State) error {
// Strobe end
d.pinE.Low()
d.pinDB0.Low()
d.pinDB1.Low()
d.pinDB2.Low()
d.pinDB3.Low()
d.pinDB4.Low()
d.pinDB5.Low()
d.pinDB6.Low()
d.pinDB7.Low()
time.Sleep(time.Millisecond - dataStrobeTimeout - adressWriteTimeout)
return nil
}
@ -269,7 +260,7 @@ func (d *mt12864a) readByte(cd, l, r rpio.State) (byte, error) {
// Wait, checking status byte
func (d *mt12864a) waitReady(l, r rpio.State) error {
d.logger.Println("Wait ready", l, r)
//d.logger.Println("Wait ready", l, r)
d.busInput() // Set bus to input
d.pinRW.High() // We read
d.pinA0.Low() // Status
@ -286,7 +277,7 @@ func (d *mt12864a) waitReady(l, r rpio.State) error {
d.busInput() // Set bus to input
for counter := 0; counter < maxWaitCycles; counter++ {
if d.pinDB7.Read() != rpio.High {
d.logger.Printf("BUS:%d%d%d%d%d%d%d%d\n", d.pinDB0.Read(), d.pinDB1.Read(), d.pinDB2.Read(), d.pinDB3.Read(), d.pinDB4.Read(), d.pinDB5.Read(), d.pinDB6.Read(), d.pinDB7.Read())
//d.logger.Printf("BUS:%d%d%d%d%d%d%d%d\n", d.pinDB0.Read(), d.pinDB1.Read(), d.pinDB2.Read(), d.pinDB3.Read(), d.pinDB4.Read(), d.pinDB5.Read(), d.pinDB6.Read(), d.pinDB7.Read())
ok = true
break
}
@ -298,7 +289,7 @@ func (d *mt12864a) waitReady(l, r rpio.State) error {
// Strobe end
d.pinE.Low()
time.Sleep(time.Millisecond - dataStrobeTimeout - adressWriteTimeout)
d.logger.Println("Ready")
// d.logger.Println("Ready")
return nil
}

160
pkg/parallel8bit/parallel8bit.go Normal file
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@ -0,0 +1,160 @@
package parallel8bit
import (
"fmt"
"log"
"time"
"github.com/stianeikeland/go-rpio/v4"
)
const (
adressWriteTimeout = 140 * time.Nanosecond
dataStrobeTimeout = 250 * time.Nanosecond // (Data transfer)
maxWaitCycles = 100
)
// Interface for MT displays (do not set cristals bits)
type Device interface {
WriteByte(b byte, cd rpio.State)
ReadByte(cd rpio.State) byte
WaitReady() error
}
type DevicePins struct {
// GPIO pins
PinA0 rpio.Pin
PinRW rpio.Pin
PinE rpio.Pin
PinDB0 rpio.Pin
PinDB1 rpio.Pin
PinDB2 rpio.Pin
PinDB3 rpio.Pin
PinDB4 rpio.Pin
PinDB5 rpio.Pin
PinDB6 rpio.Pin
PinDB7 rpio.Pin
PinE1 rpio.Pin
PinE2 rpio.Pin
PinRES rpio.Pin
}
type device struct {
logger *log.Logger
DevicePins
}
func New(logger *log.Logger, pins DevicePins) Device {
return &device{
logger: logger,
DevicePins: pins,
}
}
func (d *device) WriteByte(b byte, cd rpio.State) {
// d.logger.Println("Write byte", b, cd, l, r)
d.busOutput()
d.PinRW.Low() // We write
d.PinA0.Write(cd)
// Write bus
d.PinDB0.Write(rpio.State((b >> 0) & 1))
d.PinDB1.Write(rpio.State((b >> 1) & 1))
d.PinDB2.Write(rpio.State((b >> 2) & 1))
d.PinDB3.Write(rpio.State((b >> 3) & 1))
d.PinDB4.Write(rpio.State((b >> 4) & 1))
d.PinDB5.Write(rpio.State((b >> 5) & 1))
d.PinDB6.Write(rpio.State((b >> 6) & 1))
d.PinDB7.Write(rpio.State((b >> 7) & 1))
// Strobe start
d.PinE.High()
time.Sleep(dataStrobeTimeout)
// Strobe end
d.PinE.Low()
time.Sleep(time.Millisecond - dataStrobeTimeout - adressWriteTimeout)
}
func (d *device) ReadByte(cd rpio.State) byte {
// Setup
var b byte
d.busOutput()
d.PinRW.High() // We write
d.PinA0.Write(cd)
// Strobe start
d.PinE.High()
time.Sleep(dataStrobeTimeout)
// Read
b = uint8(d.PinDB0.Read()) |
(uint8(d.PinDB1.Read()) << 1) |
(uint8(d.PinDB2.Read()) << 2) |
(uint8(d.PinDB3.Read()) << 3) |
(uint8(d.PinDB4.Read()) << 4) |
(uint8(d.PinDB5.Read()) << 5) |
(uint8(d.PinDB6.Read()) << 6) |
(uint8(d.PinDB7.Read()) << 7)
// Strobe end
d.PinE.Low()
time.Sleep(time.Millisecond - dataStrobeTimeout - adressWriteTimeout)
return b
}
func (d *device) WaitReady() error {
d.busInput() // Set bus to input
d.PinRW.High() // We read
d.PinA0.Low() // Status
time.Sleep(adressWriteTimeout)
// Strobe start
d.PinE.High()
time.Sleep(dataStrobeTimeout)
// Wait status flag drop
ok := false
d.busInput() // Set bus to input
for counter := 0; counter < maxWaitCycles; counter++ {
if d.PinDB7.Read() != rpio.High {
//d.logger.Printf("BUS:%d%d%d%d%d%d%d%d\n", d.pinDB0.Read(), d.pinDB1.Read(), d.pinDB2.Read(), d.pinDB3.Read(), d.pinDB4.Read(), d.pinDB5.Read(), d.pinDB6.Read(), d.pinDB7.Read())
ok = true
break
}
}
if !ok {
return fmt.Errorf("busy timeout")
}
// Strobe end
d.PinE.Low()
time.Sleep(time.Millisecond - dataStrobeTimeout - adressWriteTimeout)
// d.logger.Println("Ready")
return nil
}
// Set bus pins to output
func (d *device) busOutput() {
d.PinDB0.Output()
d.PinDB1.Output()
d.PinDB2.Output()
d.PinDB3.Output()
d.PinDB4.Output()
d.PinDB5.Output()
d.PinDB6.Output()
d.PinDB7.Output()
}
func (d *device) busInput() {
d.PinDB0.Input()
d.PinDB1.Input()
d.PinDB2.Input()
d.PinDB3.Input()
d.PinDB4.Input()
d.PinDB5.Input()
d.PinDB6.Input()
d.PinDB7.Input()
}